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Species · Iowa · BBS 2025 Release · 1966–2024

Eastern Wood-Pewee Population Trend in Iowa

All statesAerial insectivores

Eastern Wood-Pewee in Iowa has edged up: up 14% on the route-weighted index since 1969.

+14%Since 1969TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
39Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
57YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Eastern Wood-Pewee Trends in IowaNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

No notable trend signals for Eastern Wood-Pewee in Iowa. See the full index history below.

Eastern Wood-Pewee Population Forecast in Iowa

If the recent trend holds, Eastern Wood-Pewee in Iowa is projected to fall about 21% by 2029 — from 1.7 in 2024 to a central estimate of 1.4 (95% range 0.72–2.0). A 5-year backtest shows a typical error of ±16.7%, with 100% of held-out values landing inside the 95% band.

-21%Change by 2029TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
1.4Projected 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.72–2.095% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±16.7%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, Eastern Wood-Pewee in Iowa is projected to fall about 21% by 2029 — from 1.7 in 2024 to a central estimate of 1.4 (95% range 0.72–2.0). A 5-year backtest shows a typical error of ±16.7%, with 100% of held-out values landing inside the 95% band.19672029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
20251.30.702.0
20261.30.712.0
20271.40.712.0
20281.40.712.0
20291.40.722.0

Eastern Wood-Pewee Survey Routes in Iowa

Routes recording Eastern Wood-Pewee in Iowa.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →
Festina820241968
Exline620241974
Bedford620181968
Alice619991967
Washta520141967
Mt Hamill420241967
Red Rock420241969
Wales420181967
Hudson420221967
Burchinal420151997
Melrose320241977
Panther320241967
Clare320191967
Tipton320171993
Mccallsburg320191996
Bryant220241971
Cedar Valley219971967
Desmoines219741968
Dinsdale220051970
Kanawha220241976
Rock Valley220181972
College Spgs 2220232007
Lafayette220242003
College Spgs119881967
West Liberty120241968

Eastern Wood-Pewee Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaillinoisindianakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsin

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.